135 lines
3.3 KiB
PHP
135 lines
3.3 KiB
PHP
<?php
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$start=microtime(true);
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function sim($a, $b){
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$averageA=average($a,$b);
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$averageB=average($b,$a);
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$div=0.0;
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$sumA=0;
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$sumB=0;
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foreach($a as $i=>$value){
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if(!empty($value) && !empty($b[$i])){
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$div+=($value - $averageA)*($b[$i] - $averageB);
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$sumA+=pow(($value-$averageA), 2);
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$sumB+=pow(($b[$i]-$averageB), 2);
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}
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}
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return ($div / (sqrt($sumA) * sqrt($sumB)));
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}
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function r($p,$i,$data){
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return average($p,$p) + c($p,$i,$data);
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}
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function c($p,$i,$data){
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$divident=$divisor=0.0;
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foreach($data as $q){
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if (empty($q[$i]) || $p===$q){
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continue;
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}
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$simPQ=sim($p,$q);
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$averageQ=average($q,$p);
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$divisor+=abs($simPQ);
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$divident+=(($q[$i]-$averageQ)*$simPQ);
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}
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return ($divident / $divisor);
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}
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function wrapR($subject, $item, $data){
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return r($data[$subject], $item, $data);
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}
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function average($set, $controlSet){
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$average=0.0;
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$count=0;
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foreach($set as $i=>$value){
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if (!empty($value) && !empty($controlSet[$i])){
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$average+=$value;
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$count+=1;
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}
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}
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return ($average / $count);
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}
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#$ratings=array(
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# "alice"=>array(5, 1, 0, 3, 2),
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# "bob"=>array(3, 1, 5, 4, 2),
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# "carol"=>array(4, 0, 5, 0, 3),
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# "chuck"=>array(1, 4, 0, 0, 2),
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# "dave"=>array(0, 4, 3, 0, 1),
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# "eve"=>array(5, 4, 5, 4, 3),
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# "fran"=>array(4, 0, 0, 0,2),
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# "gordon"=>array(3, 4, 0, 5, 1),
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# "isaac"=>array(5, 0, 4, 3, 0),
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# "ivan"=>array(3, 1, 1, 0, 1)
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#);
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#echo sim($ratings['alice'],$ratings['ivan']);
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#echo "<br>";
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#echo "<br>";
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#echo wrapR('alice', 2, $ratings);
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#
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#die();
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echo "<title>[BETA] prediction</title>";
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$date=array(date("Y"),date("n"),date("j"));
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#$date=array(2014, 8, 26);
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$diffuse=0;
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$selectionStart=mktime(0,0,0,$date[1],$date[2],$date[0]);
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$selectionEnd=$selectionStart+(60*60*(24+date("I",$selectionStart)));
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$rangeSelector=array('time',$selectionStart-$diffuse,$selectionEnd+$diffuse);
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$data= $db->selectRange('temp2','*',$rangeSelector);
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foreach($data as $record){
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$tupel=$record;
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}
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$data=null;
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#var_dump($tupel);
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#echo date("H:i:s", $tupel['time']);
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$month=date('n', $tupel['time']);
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$year=date('Y', $tupel['time']);
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$day=date('j', $tupel['time']);
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#$div=getdiv('temp');
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$div=1;
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for($i=1; $i<=$day;$i++){
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$selectionStart=mktime(0,0,0,$month,$i,$year);
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$selectionEnd=$selectionStart+(60*60*(24+date("I",$selectionStart)));
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$rangeSelector=array('time',$selectionStart-$diffuse,$selectionEnd+$diffuse);
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$data= $db->selectRange('temp2','*',$rangeSelector);
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$sumary[]=prepareData($data,$div,$selectionStart,$selectionEnd);
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}
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#foreach($sumary as $key=>$daily){
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# echo "<tr><td>Day: ".($key+1)."</td>";
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# foreach ($daily as $key=>$hour){
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# echo "<td>".$key."-".$hour." ";
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# }
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# echo "</tr>";
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#}
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$div=getdiv('temp');
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echo "prediction for ".date("d.m.Y");
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echo "<table border='border-collapse'>\n";
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echo "<tr><th>hour</th> <th>prediction</th> <th>difference</th><th>actual measurement</th></tr>\n";
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for ($i=0;$i<25;$i++){
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$r=wrapR($day-1,$i,$sumary);
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$r=$r/$div;
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$r=round($r,2);
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$a=$sumary[$day-1][$i+1]/$div;
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$a=round($a,2);
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echo "<tr><td>".$i."</td><td>".$r."</td><td>".round($r-$a,2)."</td><td>".$a."</td></tr>\n";
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}
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echo "</table>\n";
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#for($i=0;$i<=24;$i++){
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# $hours[]=$i*60*60;
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#}
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#var_dump($hours);
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#var_dump(array($month,$year,$day));
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$runtime=microtime(true)-$start;
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echo "<div style='position:fixed;bottom:20px;right:50px;' >Runtime: ".$runtime." s</div>";
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$db->close();
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die();
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